I have a 5 month old female. We’ve been through one 6-wk beginner obedience class and she did fairly well. She is only crated if everyone is out which is not very often. She has access to a large back yard, she chases the cat, plays on a platform swing, has tons of toys and we play fetch daily. She has started sleeping on the bed at night. I mention this because she is worse at night. She wants to bite and gets furious if told “no”. She will then try to really bite with teeth bared and barking. I admit I’ve popped her twice as a reflex (she gets really mean). I’ve removed her from the room, crated, ignored and then gave positive feedback when she settles down but then it all starts again. If I very firmly tell her no she gets so angry that she slams her front paws and face into the mattress and then tries to rip the sheet. She is our 4th Golden between my family and my mom. We’ve never experienced anything near this level of aggression. She will throw herself around and have an all out temper tantrum. She’s also smarter than any dog we’ve ever had. I’m so frustrated because I want us to bond and I feel that our evenings (when I can spend the most time with her) get ruined because of her behavior. We plan on continuing obedience classes but would love some advice in the meantime.